noun
Money returned to a payer, such as a deposit refund, tax rebate, or overpayment repayment.
保証金の払戻金が口座に振り込まれた。
The deposit refund was transferred to my account.
税金の払戻金を受け取るには確定申告が必要です。
You need to file a tax return to receive a tax rebate.
返金 is a more general term for returning money, often used for refunds in commercial transactions. 払戻金 specifically refers to money paid back from a fund, deposit, or tax overpayment.
Compound of 払い戻し (はらいもどし, 'repayment, refund') + 金 (きん, 'money').